Press LEFT, RIGHT, X, B, A, Y, RB, RT, DOWN, UP, LB, LT at the title screen to unlock all bonuses. A message will confirm correct code entry. Note: Enabling this code will disable achievements and high score:

ACHIEVEMENT - HOW TO UNLOCK
the IDEAL (10 points) - Spring Valley cleared.
the POSSIBILITY (20 points) - Mystic Forest cleared.
the CONFUSION (30 points) - Soft Museum cleared.
the AFFECTION (10 points) - Splash Garden cleared.
the CONSCIOUSNESS (20 points) - Frozen Bell cleared.
the REVIVAL (30 points) - Stick Canyon cleared.
the GROWTH (40 points) - Twin Seeds cleared.
into dreams... (50 points) - Cleared all stages with All A Rank.
DREAMY !!! (30 points) - Got best rating "DREAMY" in Acrobat Time.
Paraloop Master (100 points) - Successfully Paralooped all of Gillwing’s tail in one hit.
Mystic Garage (10 points) - Guided the lost car to the garage.
Hello Mepian (40 points) - Witnessed the hatching of Mepian.
Merry Christmas! (10 points) - Spring Valley (Christmas) cleared.